Beading or flaring machine which varies off-center position of tool



BEADING QR FLARING MACHINE WHICH VARIES OFF-CENTER POSITION OF TOOLFiled Sept. 18, 1943 June 1', 1948- H. E. H-ULL ETAL I 4 Sheets-Sheet lJune 1, 1948. H. E. HULL El 1. 2,442,495

BEADING OR FLARING MACHINE WHICH VARIES OFF-CENTER POSITION OF TOOLFiled Sept 18, 1945 4 Sheets-Sheet 2 June 1, 1948. HULL E 2,442,495

BEADING OR FLARING MACHINE WHICH VARIES OFF-CENTER POSITION OF TOOLFiled Sept. 18, 1943 4 Sheets-Sheet 3 Ig 4; /5 I June 1, 1948. I; ETAL2,442,495

BEADING OR FLARING MACHINE WHICH VARIES OFF-CENTER POSITION OF TOOLFiled Sept. 18, 1943 4 Sheets-Sheet 4 Patented June 1, 1948 UNITEDSTATES PATENT OFFICE BEADING a FLARING MACHINE wnrcn VARIES OFF-CENTERPOSITION 0F TOOL Application September 18, 1943, SerialNo. 502,984

18 Claims. 1

This invention is a machine for beading and flaring portions of tubulararticles.

One of the objects of the invention is to provide a mechanism of simpleconstruction, which is capable of use for operating a beading tool or aflaring tool, as desired. A further object is to provide a machine ofthe type described having a tool-carrying block of novel construction soconstructed and arranged that it may be quickly and accurately adjustedto off-center position with respect to the work. A further object is toprovide a simple means for adjustably varying the extent of saidoff-center adjustment.

The invention will be hereinafter fully set forth and particularlypointed out in the claims.

In the accompanying drawings:

Figure 1 is a side elevation of the machine constructed in accordancewith the invention, parts being shown in section.

Figure 2 is an end View.

Figure 3 is a top plan view, with the driving motor removed.

Figure 4 is a detail sectional View on the line 4-4, Figure 1.

Figure 5 is a detail sectional view on the line 55, Figure 1.

Figure 6 is a detail sectional view illustrating a flaring die andflaring cone in place of the beading die and roller of the precedingfigures.

Figure 7 is a side view of a modified form of the invention.

Figure 8 is a longitudinal sectional view of Figure 7.

Figure 9 is an end view of the modification illustrated by Figure '7.

Figure 1G is a cross-section on the line |i!l0, Figure 7.

Referring to the drawings, it designates a housing of any desiredconstruction. Located within the housing is a spindle H, which isrotatively mounted in suitable anti-friction bearings i2, and operativelconnected with the shaft 53 of a motor M, through suitable gearing G.The bearings l2 are maintained in separated relation by a sleeve M.

The spindle H is provided with an axial bore 15 of rectangular crosssection, and slidingly mounted for axial movement therein are cam blocksit, each having a'plurality of inclined cam faces Ilia. Said cam blocksare of a cross section corresponding to that of the bore is, so thatthey will rotate with the spin-die, and extend the full width of thebore i5. Slidingi'y mounted between the cam blocks it is thetool-carrier block I1 of rectangular cross section, having cam faces Ila complementa-l to the cam faces ita of the cam block. The sides ofblock i'l engage the sides of the bore [5, so that the block I! willalso rotate with the spindle H. The block I! is also provided with atransverse, axially elongated slot l9, having an offset portion l9a toform a transverse opening approximately L-shape in cross section. A pin'20, which is anchored to the spindle, extends through the slot [9. Theouter end of the housing is closed by a cover plate 2|.

The cam blocks [6 are connected in suitable manner to an interposedoperating block 25, as by screws 26, so that said operating block andthe cam members may be moved in unison. The operating block 25 isprovided with a reduced portion 21 separated by annular shoulders 23. Itis also provided with an axial bore 29, which is internally screwthreaded to adjustably receive the threaded stem 3|] of a stop member S.Said stop member extends through said bore to a position adjacent theinner end of the tool block I1, and is held in any adjusted position bya lock nut 3|.

Rotatively mounted in a yoke 32 of the housing i0 is a lever L on whichis mounted a supplemental yoke 33, held against rotation by means of akey 34 and a set screw 35. Mounted in the arms of the supplemental yoke33 are studs 36, which extend toward each other into the space betweenthe shoulders 28 of the operating block 25, and are provided withrollers 31 to engage said flanges. By means of this arrangement, it willbe observed that sliding reciprocative movements may be imparted to thecam blocks by rocking the lever 33 in either direction, movement beingimparted to the cam blocks by the action of the rollers 31 against therespective shoulders 28.

The bore I 8 of the block I! is internally threaded to receive anadjustable externally threaded adjusting sleeve 40, which is held inadjusted position by means of a lock nut 4|. A spring pressed detent 42releasably engages a groove in the tube-working-tool spindle 43.Suitable bearings 44 are provided in the sleeve it to permit rotation ofthe block 11 and said sleeve with respect to the tool T.

Any suitable means may be employed for supporting the tube W in properposition with respeot to the tool. For purposes of illustration, adesirable type of mechanism is shown in the drawings. Referring moreparticularly to Figures 2 and 3, 50 designates a fixed jaw which isattached to the housing In in suitable manner, such as by means of bolts5 I. Pivotally mounted dog 60, having a pin 6! complemental to a recessin the adjacent die block section. The dog 60 is mounted on a springpressed member 62, the spring 63 of which urges it in a direction tomaintain the pin 6| in engagement'with its recess. See Figure 6. When itis desired to remove the die from the jaw, themember 62. is

pressed inwardly against the tension of its spring 63, so as todisengage the pin Bl from the die.

Said member 62 is then rotated so that the dog clears the die. Each dieis also preferably provided with a recess 66, to receive two rubberslugs 61, which are held in place by a plate 58 attached to the diemembers by screws 69. Each slug is of sufficient thickness and width toextend a slight distance axially beyond the end of its recess 66 so asto provide a clearance space to permit adjustable compression upon theblock by the plate 58, by adjustment of the screws 69. In practice, theclamping jaws are opened by moving the lever 54 to the dotted lineposition of Figure 2 and are brought into clamping relation with thework W by movement of the lever to the full line position.

The sectional dies are preferably constructed so that the work W isclamped solely by the rubber slugs 6'5. In this manner, the flatsurfaces of the dies engage one another to form a perfect die into whichthe work is expanded during beading or flaring, regardless of slightvariations in the outside diameter of the work.

In operation, the lever L is moved to the extreme left dotted-lineposition-Figure l--which causes the cam blocks l6 and the tool-carrierblock I 1 to move to the left to clear the work. While the lever and thetool-carrier block are thus positioned, the work may be disengaged fromthe clamping jaws. The lever L is then moved to the full-line position,indicated in Figure 1. During this movement the cam blocks l6 and thetool-carrier block I! travel together in an axial direction, because pin20 in slot I!) will prevent any off-center movement of the block I1.Therefore, the cam surfaces I60. and Ha will interlock to preventrelative sliding movement. Relative axial movement of the tool-carrierblock I! to the right, as viewed in Figure 1, is arrested when the pin20 abuts against the end wall of slot l9 at a position opposite theoffset portion [Scsee Figure 1. After the parts are thus positioned theworking tool T is adjusted longitudinally by means of sleeve 30 and locknut 4!, so that the projecting bead portion of the tool is directlyopposite the groove 9 of the die. The sleeve 40 has a head C whichcontacts the inner face of the beading tool shoulder t. The end of thetube or work W is then positioned against the outer face of the headingtool shoulder t and clamped. In this last mentioned manner the end ofthe tube is properly located with respect to the die. The stop screw 38is then adjusted to limit the extent of heading movement, and locked bythe nut 3|; This adjustment prevents the operator from over-beading oroverfiaring the tube, so as to excessively thin the tube wall at andadjacent to the beaded portion thereof.

Assuming that it is desired to form a bead or flare in a tubular memberW, as illustrated in Figure 1, the extent of the beading or flaring iscontrolled by the distance between the adjacent portions of the stopmember 30 and the tool block H. The motor M is then started, and theoperator starts to move the lever L to the extreme right, as viewed inFigure 1. This last mentioned movement of the lever produces a relativemovement of the cam blocks with respect to the tool block, because theoffset portion lSa of the lot l9 provides clearance for radial movementof the tool block l1, thereby causing the cam surfaces i6a and I'Ia toreact in such manner as to push the block I! downwardly off-center, sothat the ofiset portion l9a moves over said pin. When the stop 38engages the block I 1, no further axial movement of the tool-carrierblock can occur, because relative movements of the blocks is and H areprevented. The motor causes the toolcarrier to rotate with the spindleand cam blocks, and the tool is rotatably mounted in the toolcarrierblock, so that as the tool shifts off-center, the bead in the tube isprogressively formed by a rolling action of the tool within the tubularmember W. This rolling action produces a bead superior to that made ifthe tool were rigidly mounted in the tool-carrier-block and formed thebead by a sliding frictional action. The extent of beading, as abovestated, is limited by the engagement of the end of the stop 30 with thetool block I I.

At the completion of the beading operation, the lever L is rocked to theleft to the extreme dotted line position, as viewed in Figure 1, so asto recenter the tool and withdraw the same from within the work W,permitting removal of the completed beaded tube. After removal of thelatter, the lever L is again rocked to the solid line position tocondition the machine for positioning and clamping the next tube and thedescribed operation repeated. If it is desired to flare the end of thetube, the tube-end is properly located with respect to the die byengaging said tube end with a conical surfaced tool T, as shown inFigure 6, while the lever L is in solid line position. Thereafter, theoperations are identical with those previously described.

Referring more particularly to Figures '7 to 10, both inclusive, thespindle H is shown as constructed of two halves Ila and Nb, these halvesbeing secured together by means of bolts llc. Instead of forming theL-slot IS in the tool-carrier block IT, as previously described, thelower half llb of the spindle H is provided with oppositely disposedrecesses 11. A block b is located in each of the recesses a, being heldin position by screws 0, so as to form diametrically opposite L-shapeslots d. The complemental pin Zfia is mounted in the tool-carrier blockH, with its end portions projected into the said slots d. The operationof these parts, however, is the same as that described in connectionwith the previously discussed figures of the drawings.

The advantages of the invention will be readily understood by thoseskilled in the art to which it belongs. For instance, it will beobserved that off-center adjustment of the tool-carrier-block may bequickly and accurately effected. Another advantage is that the angularcross-section of the spindle bore, and the complemental cross sectionsof the cam and the tool-carrier-block effectively insures rotation ofsaid cam and the block with the spindle, while also maintaining them inalignment during relative sliding adjustments thereof. An important.advantage. is that an exceedingly simple complementalv cam arrangementis provided, by which the extent. of cit-center movement of thetoolecarrier-block may be readily effected.

Having thus explained. the nature of the inven-. tion and described anoperative manner" of constructing and using the same, although withoutattempting, to set. forth all: of. the forms in which it may be made, orall of the forms of its use; what is claimed is:

1. In a beading and flaring, machine of. the character described, aspindle member;- having. an axial bore, means for. rotativel'y'supporting the same, cam means axially slidable in said'borezandrotatable with the spindle member; a tool-carrier block axially disposedwithin said cam: means and rotatable therewith, said tool carrier blockbeing axially slidable and capable of ofi-center: move-- ments withinsaid cam means", means for imparting limited axial sliding movements tosaid cam means with respect to said tool-carrier block, and meansoperated. by said relative sliding movements for moving the tool-carrierblock to and from an ofii-center position.

2. In a beading and flaring machine of the character described, aspindle member having an axial bore, means for rotatively supporting thesame, cam means axially slidable within said;

bore and rotatable with the spindle member, a tool-carrier block axiallydisposed within said cam means and rotatable therewith, said toolcarrier block being axially sli'dable and. capable of oiT-centermovements within said cam means, means for imparting sliding movementsto the cam means and tool-carrier block together, means for interruptingsaid movement of the tool-carrier block during continued movement of thecam means, and means operated by the relative sliding movement of thecam means and carrier block for moving the latter to and from anolfcenter position,

3. In a beading. and flaring machine of the character described, aspindle member having an axial bore, means for rotatively supporting thesame, cam blocks slidingly mounted within said bore and rotatable withthe spindle member, a tool-carrier block axially disposed between saidcam blocks and rotatable therewith, said tool carrier block beingaxially slidabl'e' and capable of ofi-center movements between said camblocks means for imparting limited sliding movements of the cam blockswith respect to said tool-carrier block, and means operated by saidrelative sliding movements for moving the tool-carrier block to and froman oil-center position.

4. In a. beading and flaring machine of the character described, aspindle member having an axial bore, means for rotatively. supportingthe same, cam blocks slidingly mounted within said bore and rotatablewith the-spindle member, a

offecenter position during said relative movement of'thecam blocks.

5. Int. beading. and flaring machine of the character described, aspindlememb'er'having' an axial bore, means'for 'rotatively supportingthe same, cam; means axially slidable in said bore and rotatable; withthe spindle member, aptoole carrier block. axially disposed within saidcam means. and rotatable therewith, said tool carrier bIock' beingaxially slidable and: capable of' off-- centenmcvement within said cammeans, means for: imparting: sliding. movements to said cam meanswithrespect: to said tool-carrier block, means operated. by; said relativesliding movements for moving the tool-carrier bloclr to and from anoff-center. position, and means operable by movementof said came meansfor limiting the extent of said off-center, movement.

6. In a beading: and flaring machine, of the character describeda;spindle member having an axial bore, means for rotatively supportingsaid spindle, cam blocks slidinglymo-unted within said bore androtatable with the spindle member, a tool-carrier block axially:disposed between said cam blocks; and rotatable therewith, saidtoolcarrier block: being axially slidable and capable of oil-centermovements between said: cam blocks means for imparting sliding movementof the cam blocks with-respect to said tool-carrier block, said camblocks and said tool-carrier block hav ing interengaged complemental camsurfaces for moving the tool-carrier block to and from an offcenterposition during". said relative movement of the cam. blocks, and meansoperated by sliding movement of said cam blocks. for limiting the extentof saidofi-centermovement.

7. In a" beading and flaring machine of the character described, aspindle member having an axial bore of angular cross section, means forrotatively supporting: said spindle, cam members sliding-1y mounted insaid: bore and having a cross section complemental'to the cross sectionof said bore;.a tool-carrier block axially disposed between said cammembers. and rotatable therewith, said tool carrier member having across section complemental to the. cross section of the cam members andbeing axially slidable and capable of off-center movements between saidcam members, means for imparting sliding movement to the; cam membersrelative to said tool-carrier block, and means operated by said relativesliding movements for moving the tool-carrier block to and from anoff-centerpos'itl'on.

8. In a beading and flaring machine of the character described, aspindle member having an axial bore of angular cross section, means forrotatively supporting said spindle, cam members slidingly mounted insaid bore and having a cross section complemental to the cross sectionthereof, a tool-carrier block axially disposed between. said cam membersand rotatable therewith, said tool carrier block having a cross sectioncomplemental to the cross section of the cam members and being axiallyslidable and capable of oil-center movements between said cammembers,.means for imparting sliding movement to the cam members withrespect to the toolcarrier block, means operated by relative slidingmovements for moving: the tool-carrier block to and from an oft-centerposition, and an adjustable'stop: movable with said cam members forlimiting the extent of said off-center movement.

9. In a beading and flaring machine of the character described, aspindle member having an axial bore of rectangular cross section, meansfor rdtativel'y supporting said spindle, axially slidable cam blockslocated within said bore and having a cross section complementalto thelat-- ter, a tool carrier block axially disposed between and rotatablewith said camblocks, said toolcarrier member having a cross sectioncomplemental to the cross section of the cam blocks and being axiallyslidable and capable of oil"- center movements between said cam blocks,means for imparting sliding axial movements to said cam blocks and alsoto said tool-carrier block, and means for interrupting the slidingmovement of said tool-carrier block during continued movement of the camblocks, said cam blocks and said tool-carrier block having complementalcam surfacesfor movingsaid toolcarrier block to and from oil-centerpositions during said relative movement.

10. In a beading and flaring machine of the character described, aspindle member having an axial bore of rectangular cross section, meansfor rotatively supporting said spindle member, cam members slidinglymounted Within said bore and also of angular cross section, atool-carrier block axially disposed between the cam members androtatable therewith, said tool carrier block being of angular crosssection and axially slidable and capable of oil-center movements betweensaid cam members, means for imparting simultaneous sliding movements tothe cam members and the tool-carrier block, and means for interruptingmovement of the tool-carrier block during continued movement of the cammembers, said toolcarrier block and said cam members having in-'terengaging surfaces so positioned as to move the tool-carrier blockoff-center during 'relative movement of the cam members with respect tothe tool-carrier block.

11. In a heading and flaring machine of the character described, aspindle member having an axial bore, means for rotatively supportingsaid spindle member, an axially slidable tool-carrier block slidinglylocated within said bore, axially slidable cam members also locatedwithin the bore and slidable with respect to said tool-carrier block,said cam members and saidtool-carrier block having complemental camsurfaces for imparting oil-centenmovem'ent to the tool-carrier blockduring the relative sliding movement of the cam members, means forimparting axial sliding movements to said cam members, means fortemporarily connecting the cam members and the tool-carrier block sothat they" will travel together during such movement of the cam members,and means for arresting said travel of the tool-carrier block after apredetermined distance of such travel, said tool-carrier block beingthen free for oiI-center movement.

12, In a beading and flaring machine of the character described, aspindle member having an axial bore, means for rotatively supportingsaid spindle member, an axially slidable toolcarrier block locatedwithin said bore and having a longitudinal slot therein provided with anoffset portion at one end, axially slidable cam members located withinsaid bore and slidable with respect to the tool-carrier block, said cammembers and said tool-carrier block having com plemental cam surfacesfor imparting off-center movement to the tool-carrier block duringsliding movement of the cam members with respect thereto, and a pincarried by said spindle member and extended through said slot, so as toarrest sliding movement of the tool-carrier block after a limiteddistance of such travel, said toolcarrier block being free foroil-center movement while said pin is in register with the ofi'setportion of said slot.

13. In a beading and flaring machine of the character described, aspindle member having an axial bore, means for rotatively supportingsaid spindle member, an axially slidable tool-barrier block locatedwithin said bore and having a longitudinal slot therein provided with anoifset portion at one end, axially slidable cam members located withinsaid bore and slidable with respect to the tool-carrier block, said cammembers and said tool-carrier block having complemental cam surfaces forimparting off-center movement to the tool-carrier block during slidingmovement of the cam members with respect thereto, a pin carried by saidspindle member and extended through said slot, so as to arrest slidingmovement of the tool-carrier block after a limited distance of suchtravel, said toolcarrier block being free for ofi-center movement whilesaid pin is in register with the offset portion of said slot, and meansfor limiting extent of said off-center movement.

14. In a beading and flaring machine of the character described, aspindle member having an axial bore, means for rotatively supportingsaid spindle member, an axially slidable tool-carrier block locatedwithin said bore and having a longitudinal slot therein provided with anoffset portion at one end, axially slidable cam members located withinsaid bore and slidable with respect to the tool-carrier block, said cammembers and said tool-carrier block having complemental cam surfaces forimparting oil-center movement to the tool-carrier block during slidingmovement of the cam members with respect thereto, a pin carried by saidspindle member and-extended through said slot, so as to arrest slidingmovement oi. the tool-carrier block after a limited distance of suchtravel, said tool-carrier block being free for oilcenter movement whilesaid pin is in register with the ofiset portion of said slot, and anadjustable stop member movable with the cam members for limiting theextent of said off-center movement.

15. In a beading and flaring machine of the character described, aspindle member having an axial bore, means for rotatively supportingsaid spindle member, an axially slidable tool-carrier block locatedwithin said bore and having a longitudinal slot therein provided with anoffset portion at one end, an operating block slidingly mounted withinsaid bore, cam blocks connected with said operating block, said camblocks and operating block being relatively slidable with respect tosaid tool-carrier block, said cam blocks and said tool-carrier blockhaving complemental cam surfaces for imparting off-center movement tothe tool-carrier block during said relative sliding movement, a pincarried by said spindle member and extended through said slot, so as toarrest sliding movement of the tool-carrier block after a limiteddistance of such travel, said tool-carrier block being free foroiT-center movement while said pin is in register with the offsetportion of said slot, and a stop member adjustably mounted within saidoperating block and positioned to engage the inner end of thetool-carrier block, so as to limit the extent of said cit-centermovement.

16. In a, beading and flaring machine of the character described, aspindle member having an axial bore, said spindle having longitudinalslots therein each provided with an offset at one end,

an axially slidable tool-carrier block located with in said bore,axially slidable cam-members also located within said bore and slidablewith respect to the tool-carrier block, said cam members and saidtool-carrier block having complemental camsurfaces for impartingoil-center movements to the tool-carrier block during sliding movementof the cam members with respect thereto, and a pin mounted in thetool-carrier block and extended through said recesses, so as to arrestsliding movement of the tool-carrier block after a limited distance ofsuch travel, said tool-carrier block being free for ofi-center movementwhile said pin is in register with the ofiset portion of said slot.

17. In a beading and flaring machine of the character described, a,spindle member formed of complemental sections and having an axial bore,one of said sections having oppositely disposed openings therein, blockssecured within said openlugs to form longitudinal slots each providedwith an oflset at one end, an axially slidable tool-carrier blocklocated within said bore, axially slidable cam-members also locatedwithin sai bore and slidable with respect to the tool-carrier block,said cam members and said tool-carrier block having complementalcam-surfaces for imparting oif-center movements to the tool-carrierblock during sliding movement of the cam members with respect thereto,and a pin mounted in the tool-carrier block and extended through saidrecesses, so as to arrest sliding movement of the tool-carrier blockafter a limited distance of such travel, said tool-carrier block beingfree for oil"- center movement while said pin is in register with theoffset portion of said slot.

18. In a beading and flaring machine of the character described, aspindle member formed of two complemental sections of semicircularcrosssection, the lower member being provided with oppositely disposedrecesses, blocks removably secured within said recesses, and cooperatingwith the latter to provide longitudinal slots each having an offset atone end, means for securing said sections together, so as to provide a,longitudinal bore, an axially slidable tool-carrier block located withinsaid bore, axially slidable cam-members also located within said boreand slidable with respect to the tool-carrier block, said cam membersand said tool-carrier block having complemental cam-surfaces forimparting off-center movements to the tool-carrier block during slidingmovement of the cam members with respect thereto, and a pin mounted inthe tool-carrier block and extended through said recesses, so as toarrest sliding movement of the tool-carrier block after a limiteddistance of such travel, said toolcarrier block being free forofi-center movement while said pin is in register with the ofisetportion of said slot.

HENRY E. HULL.

EMMETT C. HARTLEY.

REFERENCES CITED The following references are of record in the file ofthis patent:

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